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Digital hearing aid loudness compensation method based on frequency compression and movement

A technology of frequency compression and loudness compensation, which is applied in hearing aids, instruments, voice analysis, etc., can solve the problems of discomfort for hearing aid wearers and reduced speech resolution, so as to improve hearing level and speech recognition rate, and retain personality characteristics , to avoid negative effects

Active Publication Date: 2014-04-09
HAIMEN MAOFA ART DESIGN CO LTD
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AI Technical Summary

Problems solved by technology

Therefore, the traditional loudness compensation method will inevitably lead to discomfort for hearing aid wearers, and will also lead to a reduction in speech resolution.
At the same time, this is also an important reason for the discomfort of hearing aid wearers.

Method used

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  • Digital hearing aid loudness compensation method based on frequency compression and movement
  • Digital hearing aid loudness compensation method based on frequency compression and movement
  • Digital hearing aid loudness compensation method based on frequency compression and movement

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Embodiment Construction

[0026] combine figure 1 , the present invention is based on the digital hearing aid loudness compensation method of frequency compression shifting, and the steps are as follows:

[0027] The first step is to filter the speech with The frequency of Hz is sampled, the sampled signal is filtered, and the signal is divided into a low-pass part and a high-pass part. The specific process is as follows:

[0028] (1) Design a FIR (Finite Impulse Response, finite impulse response) low-pass filter and a FIR high-pass filter, and the designed filter is a Butterworth (Butterworth) filter. filter order , the normalized cutoff frequency of the low-pass filter , the normalized cutoff frequency of the high-pass filter ;

[0029] (2) Pass the sampled speech signal through the Butterworth low-pass filter and high-pass filter respectively to obtain the low-frequency part (0-4000Hz) and high-frequency part (4000-8000Hz) of the speech signal.

[0030] In the second step, the high-frequen...

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Abstract

The invention discloses a digital hearing aid loudness compensation method based on frequency compression and movement, which belongs to the technical field of voice signal processing. The digital hearing aid loudness compensation method comprises the following steps of: filtering, and extracting the low-frequency part and the high-frequency part of a signal; compressing and moving the voice high-frequency part according to proportion; simulating a voice signal heard by a patient; designing a four-channel FIR-QMFB (Quadrature Mirror Filter Banks); dividing a frequency range; and carrying out loudness compensation and gain control; and combining voice. The digital hearing aid loudness compensation method is characterized in that the original voice signal is divided into low frequency and high frequency, then, the high-frequency part is compressed and moved to a medium and low frequency range according to proportion, and the overlaid voice signal is subjected to frequency band division and loudness compensation according to a hearing test curve of a hearing impairment patient. Therefore, negative effects brought by carrying out high-gain loudness compensation on the high frequency range in the prior art can be effectively avoided, and the hearing level and the language recognition rate of the patient can be effectively improved.

Description

technical field [0001] The invention relates to loudness compensation technology, in particular to a digital hearing aid loudness compensation method based on frequency compression and transfer, and belongs to the technical field of speech signal processing. Background technique [0002] Digital hearing aids have achieved continuous development in the past ten years, especially the application of modern digital signal processing technology, which provides strong technical support for the rapid development of hearing aids. Great progress has been made in directional technology, speech enhancement, loudness compensation, feedback suppression, etc., and it has made great contributions to the hearing rehabilitation of many hearing-impaired people. [0003] Although digital hearing aids have made great progress in the past ten years, the survey found that only 30% of hearing aid users are satisfied with the hearing aids they wear, and many wearers express discomfort. The loudnes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R25/00G10L21/02G10L19/00
Inventor 张宝琳张玲华
Owner HAIMEN MAOFA ART DESIGN CO LTD
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